Furnace.



No. 836,402. PATENTED NOV. 20, 1906.

G. POLITZ.

FURNACE. APPLIOATION FILED FEB. 23, 1906.

ia -Z. I

uivITED srATEs rarinrrv OFFICE.-

' GUSTAV PoLrrz, or ATTOWITZ, GERMANY.

FURNACE.

Specification of Letters Patent. I I Patented Nov. 20, 1906;

Ap lication filed February 23, 1906- Serial N0, 302.450. 7

To alt whom it may concern.- Be it known that I, GUSTAV POLITZ, a sub ectpf theIKmg of Prussia, German Emperor,

- and a resident of Kattow'itz, Upper Silesia,

particles through said revolving grate.

- The invention also consists in the details of construction and comblnation of parts, as

hereinafter described and claimed.

One embodiment of the present invention is illustrated in the accompanying drawings, in which- Figure "1 is a longitudinal section through '9. complete furnace; Fig. 2, a vertical cross- "section through the installation shown in 'Fi 1, the section being taken through the ax e of the revolving grate; and Fig.3 a developed cross-section, on an enlarged scale, of a portion, hereinafter described, of the rotary grate. i I

.- Referring to Fig. 1, the coal passes from the hopper a, provided with the regulating feed-shutter '5, onto the slanting grate c,

which is supported upon the bars n and 0.

The coal is drawn down from the latter by means of the revolving grate cl, which is set in slow rotationby any suitable meansj 6 represents the grate-bars of said revolving grate. This revolving grate is openat one or both of its ends, and the wall or walls of the furnace are provided with one or more openings or air passages communicatmg with the open end or ends of the grate, so that the latter forms the supply-channel for the air for supporting combustion, which air becomes warmed by its proximity to the bars e, while simultaneously cooling down the latter and passing between them in part directly into thecombustible lying on the revolving grate d and in part under the slanting grate '0 and in part as secondary air,

through the annular channel i, and the openings 'i into the furnace-gases. 5

The fire-chamber is closed in front, so as to prevent the entrance of' air.

The peripheral body of the revolving grate d is formed of a number'of bars 6, which are arranged on a plurality of'disks f, provided with openings, said disks being connected firmly with the revolving axle Thebars are prevented from falling out by means of rings g, placed over their ends. The disks f and rings e are provided with corresponding recesses, in which the grate-bars-e are sup- 3 ported. Every second grate-bar e preferably has greater space for play on account of its recesses being enlarged, so that the gratebars in question fall lower'into the rings 9 when they are on the under side of the revolving grate than their neighboring bars. On

account of the grate-bars being thus movably supported it results that the spaces between the bars are continually maintained open for the purpose of enabling the passage therethrough of the air and the removal of the particles of ash which have fallen into the revolving grate. 4

A space 7c is left between the revolving grate d and the fire-bridge q, through which the larger ashes fall. In order to render possible the passage through said space of still larger pieces, a swingin suspended plate h is there arranged, which p ate is forced aside by such larger pieces, and on account of its weight afterward res'umes its perpendicular position. Another'plate orflap 'm is situated in front of the opening of the annular chanhe]. i for the purpose of enabling the air for the support of secondary combustion to be regulated. i

What I claim as my'invention, and desire 5 to secure by Letters Patent, is-

1. The combination with means for. feeding combustible material to a furnace, of a slanting or inclined grate in the fire-chamber, and to which grate said combustible mate- 10c rial is fed, and a hollow revolving grate at the lower end of said slanting grate, said revolving grate having an open end or ends so as to form asupply-channel for the air supporting combustion, and the wall or walls of the fur- 1o 5 nace having one or more openings or air-passages CODUDLIIIlCaUHg'WIT/h the said open end or ends of said grate.

2. The combination with means for feed.- ing combustible material to a furnace of a 11 slanting or inclined grate in the fire-chamber,

Q plate 'corn.bustion, and the-wall or v nacehavmg one or ranged in-proximity to but sli htly sepa- 1 a rated from said revolvin grate, so as to atford a space between itse f and said grate for the'passage therethrough of ashes, and a normally vertical, freely swinging suspended arranged in said space.

. 3. In a furnace having a closed fire-ch.am-

ber,'th e combination of means for 'feeding combustible to the furnace, a slanting grate in the fire-,chamber onto which grate said combustible is fed, and a revolving grate at rality of grate-bars engaging the hiwer end of said slanting grate, said revolt grate forming the supply-channel for. tha r supporting the combustion and coma revoluble axle, a plurality of gratend means for loosely su porting said on said axle, 'where y when the valves the grate-bars move relatively to one another, substantiallyas and for the purposeset forth. I

In a -hirnacehaving a closed fire-chamthe combination of means for feeding ibustible to the furnace, a-slanting grate in tire fire-chamber ontowhich grate said combustible is fed, and a revolving grate at the lower end of said slanting rate, said reliving grate forming the supply-channel for i air supportin the combustion and comprising a revolub e aXle, a plurality of rings having recesses in theirouter surface, means for supportingsaid rings on said axle, a .plu in said recesses, a plurality of rings having recesses of differing size intheir inner surface surroundingsaid grate-bars, and engaging with the latter by means of their recesses, and means for supporting said latter rings on the axle, substantially as and for the purpose set forth.

'ber,'the' combination 'of means for feeding to the furnace, a slanting grate said" combustible is fed, and a revolving grate at combustible in the fire-chamber onto which grate the lower end of said slanting grate, said re volving'grate forming thesupply-chttnhel for the air supporting the combustion and comprising a revoluble axle, a plurality of rings having recesses of difl'ering size in their outer suriace,-means l'orsupporting said'rings on said axle, a plurality of grate-bars engaging insaid recesses, a plurality of rings having recesses in their inner surface surrounding said grate-bars, and engaging with the latter by means of their recesses, and means for supporting said latter rings on the axle, substantially as and for the purpose set forth.

6. In a furnace having a closed fire-chamher, the combination of means for feeding combustible to the furnace, a slanting grate in the fire-chamber onto which grate said combustible is fed, a revolving grate at the lower end of said slanting grate, saidrevolving grate forming the supply-channel for the air supporting the combustion, a fire-bridge h1rnace-gases,

having a main passage for the and anannular passage round said main passage and having an opening into the lower part of the fire chamber and branch passages from said annular passage to the main passage and said bridge being arranged in proximity'to said revolving grate, and leaving space between-itself and said grate for the passage therethrough of ashes, and a no mally vertical freely swinging suspended plate arranged in said space able plate arranged at the opening into the fire-chamber of the above-mentioned annular passage, substantially as and for the purpose setforth. v

In testimony whereof'I have signed my name tothis specification in the presence of the two subscribing witnesses. GUSTAV POLITZ.

\Vitnesses:

A. W. MAN, ERKEsT KATZ.

and an adjust- 

